The Purpose of the study was designed to find out the comparison of academic achievement on selected physical fitness and psychological factors among the school respondents. 10 girls studying XIth standard in the academic year 2012 – 2013, in Government Higher Secondary School, Chidambaraviduthi, Erichi, Aranthangi, Pudukkottai, Tamilnadu, India were randomly selected to achieve the purpose of the study. They were selected based on the academic achievement in their X Standard State Board Examination as superior, good and average achievers from a total of 30 respondents. The age of the respondents ranges from 15 to 17 years. Two variables selected for the study includes physical fitness variables such as 50 mts run, Flexed arm hang and Psychology variables such as Trait anxiety, Aggression. The data is statistically analyzed using One way Analysis of Variance (ANOVA). When F – ratio values found to be significant the Scheffe’s Post Hoc Test was applied to determine the paired mean difference, if any. In all cases, 0.05 level of confidence was to test the significance. The result reveals that there existed significant differences between the superior achievers and average achievers on aggression. It is also reveals that there existed no significant difference between remaining pairs of different categories of academic achievement on Speed, Muscular endurance and Trait anxiety.